Ubuntu reconfigure xorg

Type any one of the following command to reconfigure X.org windows system:
As the root user:# dpkg-reconfigure xserver-xorg

OR as a normal user:$ sudo dpkg-reconfigure xserver-xorg

No Ubuntu Hardy Heron estou tentando ainda:

um comando que achei é o xdebconfigurator

Mas estou vendo como utilizá-lo ainda.

Para quem tem nvidia ou ATI existe o pacote abaixo:

Driver Support With Envy
Another very useful tool I’ve found is the Envy tool, which will install required non-free driver support for nvidia or ATI cards for you. I’ll admit that I’ve only used this occasionally, considering I have intel graphics cards on my main laptops, but in the situations where I have needed it things have worked great.
sudo apt-get install envyng-gtk
sudo apt-get install envyng-core
sudo envyng -t
man envyng